Ds\Map::apply
(PECL ds >= 1.0.0)
Ds\Map::apply — Updates all values by applying a callback function to each value
Description
public Ds\Map::apply ( callable $callback ) : void
Updates all values by applying a callback
function to each value in the map.
Parameters
-
callback
-
callback ( mixed $key , mixed $value ) : mixed
A callable to apply to each value in the map.
The callback should return what the value should be replaced by.
Return Values
No value is returned.
Examples
Example #1 Ds\Map::apply() example
<?php $map = new \Ds\Map(["a" => 1, "b" => 2, "c" => 3]); $map->apply(function($key, $value) { return $value * 2; }); print_r($map); ?>
The above example will output something similar to:
Ds\Map Object ( [0] => Ds\Pair Object ( [key] => a [value] => 2 ) [1] => Ds\Pair Object ( [key] => b [value] => 4 ) [2] => Ds\Pair Object ( [key] => c [value] => 6 ) )
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https://www.php.net/manual/en/ds-map.apply.php